Snap fastener



Sept. 23,1930.Y c. L.. KNUTS SNAP FASTENER Filed Dec. 3lI 1927 III l 2. 1

fait,

' perforation inthe fabricsheetg-band having i Patented Sept. 23,'. r1,930

RRQRATIONT ,aplastar 'repasa-ea apra l' Seria/1 No.

o my"CQ-pendis application f 2Q ,093,ldiSePtembel22,1192?,

My iv'ntioil which relates t0 S11-ap" fas- @monsite@biete the Provsin" of a fl y ner durableconstruction 'andfimprovled action, will be best understood 'from the following descriptionfwhen vread in thellight of the accompanying drawings of ,one specific i embodiment j of the invellltiom while the'scope o f theinvention will 4he more yparticularly pointedgout in the appended claims., l v l Y 'p In the drawingsfFigure l isa longitudinal section on an enlarged "scale, ofa snap fas-V tener zconstructed according to the invention,l vfastener being j ,Fig. 2 is a4 Viewy similari.A to'F ig. 1,'except Ythai/it corresponds with respect'togthe socket tofa' section onzthe'lineQ--Z'of Fig'. 4;

' Fig, Sis a sideelevationonjthe kfromftheright of F ig. 3 gand j Fig. tlis asection on the of for convenience of illustration only. isshown asjarranged Y for detachablylsecuring to eachv 'other fabric sheets and b', the sheetr a having attached thereto Athe socketl, andthe sheet bj having attachedtheretov thestud, 3, which is adapted to be removably insertedfinto. the '.sock et. f f

having a marginal fw'allf( 4'which atV its outer- For securing thefstud tolthe fabric, sheet,

`150i' which is inserted through the perfora-y tion inthe portion 5v yof th'evst'ndl and headed as at 17,' vsaid vshank extending-through a a flanged head 19 resting against the side lof the fabric' sheet kopposite'the baseflange 13 of thestud so as to clamp saidI sheetbetween saidportionsand thussecurely hold'the stud.

port-Ein'any suitable manner-.g As'showm theouter wallll of the stud is edge 'is rever'sely turned as at 9` to. provide' an outer wall 11 which carries a base flange 13;y

UFSQL MAYWoom v:t'LLrivoIsiy Assijeivonrooiivcniimniirncrnino oF-oHIoAGdiLLINoIs, .a vooBronArron oFILLrnoIs y p v should be'understood that i the same type f stud may be -s ecureflvto .any suitable suptapered from the portion 9 to the base flange 13 so-.jas topres/en'ta stud having ahead-2l AS herein illustrated,fihsbekethsabse perforatedat 27 for reception ofthe shank 29v ofv a tubular; rivet', the latterv for; securing the.. socket tof/,the fabric sheet ay in af manner similar to .that described in connection with the Studg we the socket `has Vintegrallyiformedl therewith a continuous ,marginal wall having ak portion 3l generally perpendicularto thejplane ofthe v lyrhannel-shaped in A crossfsectiion,l that ris to say concave with'respeet to the socket axis, this constructionaffording 'a :rigid body porbase and an outer portion 33 whichlisgeneraltion `'f or the T sockec.y f {As y'shofwn,` the f outer j edge of the portion .B3/ ofthegmarginabwall ent in respect lto planes including thesocket Fin.' v f axis toffpresentjawfaces whch'areconvex i lefering tothe drawings, "thefastener,

withrespect to said axis. t

has integrally formed therewith the b'asesof As herein illustrated, in respect lto J planes y'transverse to" the socket axis ofthe .jaws not necessaril1};,= but preferably, being. sphreroidal..y "By ma ing thjepjawsconvez; jwith Vrespect .tojthe socket axis inplanes' ,n transverse to saidaxis, the stud may beinsertillustrated, lthe studoomprises a per-` forated intermediate transverse portionl ed or'removed relativetothe socket with/minimumtransverse orradial movementof the.

jawsfthis movement being muchles's than oc! `curs under similar conditionswith7-$0cket constructions wherein .the faces of; the'gaws aregconcentric with thesocket axlsfas has heretfore'been proposed. This permits the jawstobe made of heavier and stiffer material l.than ,has heretofore beenI possible, .with less strain on Nthe jaws yand better` securing mitting insertion or removal of the stud withy are vcon-vezlwth .respect to said;axis, the vfaces niuch less friction between these parts than 'f 'possible with the prior construction above re- Jerredy to wherein the head of the stud during 1 insertion or removal engages with the opposite edges of the faces of the jaws. This cons :struction of havingthe jaws convex with respect to` thesocketl aXis both in planes transfverse to. saidaXis andin planes ineludingsaid f axis resultsin securing point topointeontact ramena@jawsfadhaciof the sudrdufing s insertion 'Qlreniovaljof theflatter', thereby rie-'i j dueing to aininirnum the frietionalzres'istance during the entrance and reinovalof the ;{st,1 1g l.vl "The before-mentioned advantages would in some degree lbe presentedgbyl a' construction;VV wherein the vends of the jaws, considered 1n planes transverse tothe axis-ofthe socket,

l were straight or or 'concave construction and Y2: therefis lesspossibility forthefjjaws'tof-' set.' k l 'i i; It' will be observed that the specificfernbodi- `of such great radius! als to bear against v*the e stud attheir central p'ortionsgonlyur How- Yfever,1-I{prefer the'jconv'ex; j-aw construction illustrated beeause itis stronger andprovides a somewhatv improved action. yFnrtherrnore,

v by x providingv y:relatively widef'jaws Awhich nient oftheinvention illustrate'dfconlprisesa soeketthebase of which' carries an unbroken',

L i metallto ypresenty vra 'supporting base carrying continuous, marginali walllfse forinedfas to sef Ycuregreat rigidity, ythe outer edges ofthe-wall adjacent "the socket openingbeing' integrally formed-with the basesjof thejaws. Y v

g I; *have* described? a preferred embodinnent ventQn *by f so, doing andfreerence is,y inadej particularly to the following-claims forthe scope'ofrmy-invention, i 'f Ifclaim-: 1 s v ,151. 'A snapy fastenerlsocketfformed ofjsheet.l

at. the periphery thereof,` ai continuous un-Lf broken lateral, wall '-ofl generally 'channelf ,fshaped Across-s ectienwith/'fthe openrsidje of Y .'extendingffrorngsaid baselta position adja-l cent the socket opening, thefedge -oisaid wall'f adj facenti sa'id? socket? opening having formedA integrally therewith a plurality of circuinferentia'lly distributed f 'inem-bers formed to provide springs having fastener-stud-head'f engagingfp'ortins interiorly ofsaidwall,` the` inner "portions of said being bentv t'o.

' f V2: snap fastenersocket formed4oij'sheet metal {co-present fa supporting base'fcarrying atf'the periphery thereofaeontinuous 'unbrb ken `lateralwall ofl generally channelshaped cross-section with the open 'side of said Chan! nel facing the" socket axis` said 'wallV extending from base to apo's'ition fadja'eent the socket opening, the edge of said vwall adjacent said-socket opening having formed integrally', therewith a vplurality of cireumferentially L formed sintegrally:v i with said, wall o substanv `tially. Vatthe plane of the socketfopeninggand Y warme mekaar-1 eine, '-1 i 1 'l' t'- afplah' 'transverse Y so'cketfbetweenisaidf'supi w 's to said axis;

rdistributed generally AC-shaped'niembers surrounded by said wall and Curved toward said base and the inner-side 'of said wall to provide jaws for detachablyV securingY the headY of Va f yastenerstudv when inserted insaid socket Y, 3. A -snapfastener socket formed of sheet metal topresen-tj a supportingbase havingja yrigidcontinuous'unbrkenilateralwall at the 'i lperipllierythereof extending rornsaid base A to@ Positionadi-@.Ceetthesoket Granmav ,Said l walijcarfyngaplurality@ se Vi'erentially" distributed, Closely Y adjacent, re-V i silientstud-engaging jaws', said i jaws surf rounded by said walljandqhaving bases being?? for-medi niumfiriterior to the aXisoi' parting b ase'k and so'eket op ening,v sai'dj j aws' in A planesVV including *thef'a iris-ft'ort disocket lpresenti gi'snieothyfunbroken"durven nap frastenerfse cketof* `metalV1 present-fa"supportingbase ca y a rig-id eohtin-ueus unbroken :lateral geneauyq @banner-Siam? fase-Seam thejopens'ide of,saidf'fchannekfaeing the i be '11s-Convex 1 respectt the socket aXlS.v

imanesfinancingsa@axis-aneirgend;

in respect rtsaidaXis in'y planesmtransverse metal to present asupp'orting'base carrying at? the kperiphery't'h'ere'of aV continuousfunf i Y broken were' wall of anaal @haar shaped-crosssection with the opensideoffsaid-- 1 ingiformed integrally; .therewith ai pmi-ai or',circurnferentiallydistributed 'mein lrs VV11g` edge of "said wall adjacent Asaid opening hav- Cil kspect to `said axis 1n planes transverse to said n ,Y o

" f the periphery thereof lextending from said fbasef to a position `adjacent the socket` open-y ing formed integrallytherewith a plurality ofy circumferentially distributed vgenerally"` C-shaped members surrounded by said wall and curved toward saidsupporting base and the inner side of said Wall to provide jaws for detachably securing the head of a fasf tener stud when inserted in said socket, those l portions of said C-shaped members which are nearest the socket axis being convexv in re- 7.Vv A snap fastener socket formedl of sheet metal tofpresent a supporting base having a rigidV continuous 'unbroken lateral wall lat ging, said wall carryinga pluralityv of separate circumferentiallydistributed, closely adjacent, f resilient studi-engaging vjaws surrounded by said Wall, said jaws having bases formedwintegrally withy said wall substantiallyattheplane of the socket opening and interiori diameter ata plane ytransverse to the sent-ing smooth unbroken curves.

" 8. In a separable fastener, a substantially i the rear edge of said bead with their ends within said bead.

In ltestimony whereof, I have subscribed my name.`

)CARL L. KNUTsoN.

rigid Vcup in whichthehead of a male mem- 'berfis received, comprising a continuous unbroken wall 'and spring-retainers formed in# Y tegral' therewith and surrounded by said wall, said spring-re`tainers arranged about the in- :side of the cup and eachk retainer presenting a portion of substantial width facing toward the center ofthe cup, said portion intermei diate its width being formed to provide only Va relatively small surface in Contact with the i male member. f f

'9.' In a separable fastener, a substantially rigidl cup in which the head of a male meme ber is received, comprising a continuous unbroken wall and spring-retainers, formed inl tegraltherewith and surrounded by said wall,

' n said spring-retainers arranged about the in- Y termediate its width being formed to permit onlysingle point contact with the male memy side ofthe cup andeach retainer presenting a Vportionl of substantial width facing toward the center of the cup, said portion inber.

A10; YIn a separable fastener, and in combi-Lf nation with the male member thereof, a fe- Vmale membercomprisinga cup in'vvhich the head of the male member is received said cup being struck up from a single niece of sheet metal and comprising a bottom, a rearwardly extending flange surrounding said bottom, and a hollow bead having a continuous, uninlteirrupted outer walll at the rear edge of said flange; and spring retainers yextending from kIl() 

